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Myler® MBT Shank with Narrow Medium Ported Barrel MB 43MP

Myler® MBT Shank with Narrow Medium Ported Barrel MB 43MP

Item #: X1-013705
In store pickup unavailable on Tuesdays at: Buffalo, Cincinnati, Medina, Milwaukee, Sacramento
Store Pickup Availability

Please note: Inventory is constantly changing so we cannot guarantee in-store availability. After placing your order, please wait for email confirmation indicating your purchase is ready for pickup.

Our Guarantee

Myler® Stainless Steel 5 1/2" MBT Shank, MB 43MP Narrow Medium Ported Barrel, Level 2-3. For Western disciplines.

The MB 43MP does not rotate onto the tongue, but instead sits solidly across the bars and lips of the horse’s mouth. The port is narrower than a Level 3 mouthpiece, but still offers room for the horse’s tongue to pass under the bit. Because the port is narrow, when the reins are engaged, the horse will feel a slight pressure on the outside edges of the tongue as a reminder rather than a strong reprimand.

The port on this mouthpiece is 1 1/2" high, so it will apply little to no palate pressure. The MB 43MP is the mildest of the Level 2-3 mouthpieces in terms of tongue pressure, just one step below a Level 3 mouthpiece. Sweet iron oxidizes and encourages salivation.

Key features:

  • Independent Side Movement™.
  • Sweet iron mouthpiece.
  • Curved mouthpiece does not pinch lips or bars.
  • Copper inlay.


  • For more tongue pressure, see the MB 27LP.
  • For more tongue relief, see the MB 41PB.
  • For slightly less tongue relief or a lower port, see the 43LP.
  • For the same benefits but with some palate pressure, see the MB 43HP.
  • For the correctional version of this mouthpiece, see the MB 47 and MB 47PB.
  • For the Level 3 version of this mouthpiece without Independent Side Movement, see the MB 12 or MB 98.

The MBT shank is a length of flat stainless steel curved slightly back toward the horse, with a teardrop purchase and a rein ring. The mouthpiece has a fixed attachment to the cheek with a decorative stack. The shank is decorated with stainless steel dots. The purchase is angled slightly away from the cheek to avoid rubbing. The MBT has the patented Independent Swivel Cheek, where the purchase, mouthpiece and shank all move independently of each other.

The MBT flat shank cheekpiece is an indirect (curb) rein action designed to be used with a curb strap which attaches to the purchase. The MBT uses the combination of fixed cheek and fixed rein to apply pressure to the mouth, chin and poll.

Action: indirect.

Degree of leverage: mild.